Acid-Base Indicators From Plants
Description: Red cabbage juice is used as acid-base indicators for testing household materials as well as laboratory chemicals.
Source: Shakhashiri, B.Z. Chemical Demonstrations: A Handbook for Teachers of Chemistry
Year: 1989 Vol: 3 Page: 50
Keywords: Indicators, Natural, Red cabbage, Indicators, Overhead projectors
Rating: 
Hazard: Some
- Electrical shock hazard
- Toxicity hazard – oral
- Skin irritation
- Serious eye damage
- Use of sharps
Effectiveness: Average
- Results are observable with guidance
- Mild effects are seen by audience
- Moderate failure rate
- Time to result is high
Difficulty: Medium
- Some concerted or timed manipulations
- Some intermediate steps to results
- Some labor intensive steps to perform
- Simple procedures
Safety Precautions:
- Eye protection required
- Gloves required
- Cutting board recommended
- Absorbent materials on hand
- Use UL approved three-prong plug and outlet
- Handle sharps with care
Class: Acids and Bases, Natural Products, Indicators
Division: General
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